Metallurgical furnace



Sept. 10, 1935.

C. R. KUZELL METALLURGICAL FURNACE l2 rsheets-sheet 1 Filed Jan. 5, 1933ATTORNEYS,

Sept. 1o, 1935.

proved reverb Patent'ed Sept. 10, 1935 Gnarles n.

mesne assignments,

tion, New York, N. Y., a

xuzeu, claudine, Ariz., minor, Aby

to Phelps Dodge Corporacorporation of New applicati@ January s, 1933,serial No. 650,236 9 claims. (cI. 26a-4e) This invention relates tometallurgy and has provision of improved metalfor an object the lurgicalapparatus. lvention contemplates More the The present application partof my application particularly, the inprovision of an imeratory furnacestructure.

is a continuation in serial No. 496,884, med

October 24, 1930 (United StatesrPatent No.\l,896,-

178, issued February 7, i933) Reverberatory furnaces rare `unfoundations embedded in upper usifally mounted the ground. The

surfaces of the foundations' are usually 4disposed at or slightly belowthe Vsurfacel of the ground which which the operating floor is nacechambers,

Iforms the operating floor or on supported. The furincluding the floorsor bottoms,

usually extend substantially entirely above the The furnaces arejusually beams for supporting provi/ded with vertical I the side walls.

Each side of the furnace is provided with@ plurality of similarly spacedbeams. The

pOints Slightly- .below beams extend from they ground line to pointsabove the upper'surface of the roof. Th beams are wedged between thefurnace walls and a concrete toe at the bottom-and tie rods extendingtransversely over the top of the furnace roof connect the beams at thetop. structures or this type are semi-rigid and do not normally allowfor expansion and contraction at the operating oor linedue to changespressure within the furnace.

During'the course tions, considerable outward ously exerted against thel beams, and it frequently happens that the con`- of temperature andfurnace 4operapressure is continu. owe;` ,portions of the crete toe, orthe wedging' means between the toe and beam, tion of one or more of thewardly. Movement of the withdrawal of the support taining the wall inits proper shape and condition with the result that the wall is weakenedvand bulges outwardly. Continued operation of a furnace in suchcondition view of the possibility Also, during the course of of`crumbling'and permitting the molten flow onto the operating floor.

crumbles and Apermits the lower porbeams to move out-l ,beams results inthe necessary for mainis very dangerous in the weakened wall material tonormal furnace operations, changesof temperature within'the'foundationsor furnace'hearth or accretions thereon cause outward expansion againstthe foundation walls which is transmitted to external structures, such,under building columns an through the ground for example, as piers d thefoundations of adjacent furnaces, with consequent danger to thestability of such external structures.

The present invention contemplates the provision of a reverberato beddedthat movement l ry furnace structure comprising a foundation which is sospaced from the ground in which external structures may be emdue toexpansion within the foundations willnot be transmitted to such externalstructures.

ment, the portions of might bef/affected by expan.

foundation which In the preferred arrangethe' walls of the furnace sionwithin the foundation hearth, etc. extend into space fromtheirsupporting structure, and they are free from contact, direct orindirect, with external formations or'structures.

The invention' further contemplates the provision of improved supportingmeans for furnace walls. The wall supporting means preferably' includeresilient supporting members yielding resistance to which offer themovement of upright braces or beams whichbincl the side walls of the Apreferred arrangement of apparatus includes a reverberatory furnacelmeans adjacent two oppos gas discharge opening centrally between theisdisposed directly ab adjacent the gas discharge heating chamber of thecates with the interior of provided with firing in the roofsubstantially firing ends. A boiler plant ove the roof of the furnaceopening,l and the boiler plant communithe furnace through a verticalflue surrounding the gas discharge opening.

'Ihe invention will ite ends and having a 25 be better understood from aconsideration of the following description-vin conjunction withtheaccompanying drawings, in

which Fig. 1

is a longitudinal elevation, partly in section, fof a. reverberatoryvfurnace and superimposed boiler plant;

Fig. 2 is a' section taken\ substantially along "line 2-2 of Fig. l; and

Fig. 3 illustrates a method of tying-in the lower Y end portions of Thereverberatory furnace ring means in the form ducing mixtures of air sidewall supports.v

I0 isprovidedwith of burners and powdered coal into ythe vinterior ofthe furnace chamber at its two opposite ends. A gas di vided in thefurnace firing ends.

scharge .opening I2 is proroof I3 midwaybetween the ,The furnace Wallsare supported on a foundation consisting of lreinforced concrete WallsI4 provided with ledgesl beams or buck stays for supporting vertical I Ifor intro I5 which engage the' side 55 a portion of the furnace the rods2| walls of the furnace. Short horizontal I-beams I6 having their endsloosely supported by brackets on the concrete foundation walls |4 and inrecesses in the parallel concrete Walls or piers I1 provide supportingmeans for intermediate working platforms I8, from which repairs or otheroperations may be conducted. Movement of the foundation wall is nottransmitted tothe piers I 1 through the beams I6. Each side wall of thefurnace is provided with a plurality of similarly spaced verticalsupporting beams I5, and the upper ends of opposite beams are connectedby tie rods having threaded ends provided with suitable nuts to permitadjustment to compensate for expansion of the furnace area.

The lower end portions of the vertical beams are held in positionagainst the furnace walls by means of the rods 2| each having one endanchored against a foundation wall I4 and the other end extendingto apoint beyond the vertical supporting beams on the opposite side of thefurnace. The rods 2| are encased in pipes 22 which extend through thefoundation walls and the earth between the walls and which are ofgreater inside diameter than `the diameter of the rods. Theends of therods 2| project into open spaces between the walls I4 and I1. The endsof are threaded and provided with nuts 23. A washer 24 is mounted on thelower end portion of each rod between the nut and the outer faces of apair of spaced I-beams 25 the inner faces of which bear against abeveled surface on the foundation wall. A helical spring 26 is mountedaxially on the upper end portion of each rod 2| between a washer 21which bears against the nut and a plate 30 which bears against the outerfaces of two parallel I-beams 3|. The inner faces of the I-beams 3| liein contact with a beveled bearing plate 32 which extends between andbears upon two adjacent vertical beams I5 The tie rods 2| are disposedat such an angle and sufficient distances below the furnace bottom thatthey are not adversely affected by high temperatures within thefoundation. The piers Il and the tie rods 2| are so formed and soarranged relatively to one another` that the tie rods may be withdrawnreadily for repair and replacement. e

The furnace chamber in its roof and side walls gas discharge opening toa damper or curtain 34 is provided with slots 33 on opposite sides ofthe permit the insertion of for closing off one end to permitindependent operation of the other end portion. The slots 33 may be wideexpansion joints which are normally closed by suitable bricks or tiles35. 'Ihe dampers use in any suitable metal casing provided with suitableconnectlons for permitting circulation of water therethrough forms asuitable damper or curtain. The dampers may be suspended above thefurnace by means of pulleys and cables (not shown). The slots anddampers may be of any the outer faces of A boiler plant consisting oftwo heating chambers 40 each having a standard make of boiler 4| mountedtherein is mounted directly above the furnace on a frame structure 42which straddles the furnace. The upright members of the frame structure42 are supported by the concrete piers The heating chambers 40 areconnected to the reverberatory furnace by means of a short vertical flue43 which surrounds the gas discharge opening I2 in the roof ,of thefurnace. Water cooled dampers 44 are provided for closing the heatingchambers when necessary.

The reverberatory furnace illustrated in the drawings is, in effect, adouble reverberatory and it may have a length equal to substantiallytwice the length of the normal furnace. The apparatus of the inventionmay include a reverberatory furnace having firing means at one end onlyinstead of a furnace having ring means at two opposite ends.

I claim:

1. The combination with a reverberatory furnace of a supporting framecomprising a set of upright supports disposed on opposite sides of thefurnace in contact with the side walls and supported upon a foundation,means for adjustably connecting the upper portions of said supports, andmeans for individually connecting the lower end portions of said uprightsupports to the foundation.

2. The combination with a reverberatory furnace of a supporting framecomprising a set of upright supports disposed on opposite sides of thefurnace in Contact. with the side walls and supported upon a foundation,means for adjustably connecting the upper portions of said supports, andmeans for individually connecting the lower end portions of said uprightsupports yieldingly to the foundation.

3. Apparatus of the class described comprising a furnace chamber, afoundation for the furnace-chamber, an upright side wall supportingmember, a tie rod anchored in the foundation and extending to a. pointadjacent the upright supporting member, and a helical spring mounted onsaid tie rod and operatively associated with said upright support toafford yielding resistance to its movement.

4. Apparatus of the class described comprising a reverberatory furnacechamber, a foundation for supporting the furnace chamber, an uprightside wall support having its lower end disposed adjacent the upper endofthe foundation wall, an inclined tie rod anchored in the foundationadjacent the bottom thereof and extending to a point adjacent theupright support, and spring means mounted on said tie rod andoperatively associated with said upright support to afford yieldingresistance to its movement.

5. Apparatus of the class described comprising a reverberatory furnacechamber, a foundation for supporting the furnace chamber, an uprightsupporting member disposed in contact with one side wall of the furnacechamber and extending to a point adjacent the upper end of the adjacentfoundation wall, and a tie rod having one end portion operativelyassociated with the lower end portion of the upright support and havingits other end portion anchored against the opposite foundation wail.

6. Apparatus of the class described comprising a reverberatory furnacechamber, a foundation for supporting the furnace chamber, an uprightsupporting member disposed in contact with one yford yielding resistanceto its movement.

7. The combination with a reverberatory furnace of a vertical beamengaging a side wall and supported upon a foundation,'adjustable meansfor limiting the movement of the upper end portion of the beam, andresilient means for individually fastening the lower end portion of thebeam to the foundation.

8. A metallurgical furnace comprising side walls resting upon afoundation wall and heldin position by means of upright supports thelower end portions of which are adjacent to the foundation wall, and atie rod for individually anchoring the lower end portion of each uprightsupport to the adjacent foundation wall, one end of said tie rod beingassociated with the lower end portion of the upright support and theother end being anchored to the opposite foundation wall.

9. In a metallurgical furnace comprising side10 walls resting upon afoundation wall and heldin position by means of upright supports thelower end portions of which are adjacent to the foundation wall, and atie rod for individually anchoring the lower end portion of each uprightsup- 15 port to the adjacent foundation wall, one end of said tie rodbeing yieldingly associated with the lower end portion of the uprightsupport and the other end foundation wall.

` CHARLES R. KUZELL.

being anchored to theopposite

